Variable-power telescope.



PATENTED DEC. 18, 1906.

G. N. SABGMULLER. VARIABLE POWER TELESCOPE.

APPLIOATIO! FILED APB, 18, 1906.

Gendt' 3 UNITED STATES PATENT OFFICE.

GEORGE N. SAEGMULLER, OF ROCHESTER, NEW YORK. ASSIGNOB T0 BAUSCH. LOMB, SAEGMULLER COMPANY, OF ROCHESTER, NEW YORK. A CORPORATION OF NEW YORK.

VA RIBLE-POWER TELEBOOPE.

No. 888,061. lpocicatton of Dotta-s Patent.. Patented Dac. 18, 1906. Applicaties Ilsd April 1.6, 1908. srlal lo. 312.016.

T 0 all whom it "my c'wfnf the usuel objective lens 2 and intermediate Be it known that I Gnome N. SAEoiiUi.4 of its ends with the adjusting-frame 3 of or- 55 Lsn s citizen of the llnited States, residing ilinsry construction for supporting the crosset Iiochester, in the county of Monroe, State lines or heirs. At the op 'te end of the 5 of New Yori-r, have invented certain new and casing from the objective ens a sup rtinguseul A:nprovements in Variable Power csp 41s secured by means of the threagd r- Telescopes, of which the following is s. specition 5 thereof engaging the inner wall 0 the 6o cation, reference being hed therein to the casinf, and this csp is provided with the insccompsnying drawings. ward v-extending tube rovided with the io This invention relates to s vsriable-powcr straight slot 7 therein. lithin this cap and telescope, snd particularly/to an instrument the tube thereof an adjusting-sleeve 8 is disof that character adapted `for use ss s transit posed and the cop secured thereon by means 65 oi' surveying instrument. of the threaded ri 9 e the portion The invention hss for an object to rovide l0 of the sleeve an adsp to be locked in l 5 anovel and im roved construction o means position thereon b a set-screw ll. The forshiftingthe ens-tubesc the erector sleeve"-8 is rovidedywith an adjusting-heed and eyepiece systems toward en from each l2 and wit e curved slot 13 extending pe- 1o other and also jointly adjusting said s stems ripherally thereof for one-hal of its circumwhile retaining the other adjusted re ation, ference. Within this sleeve the tube 14,carzo whereby the instrument may be adapted for rying the system of erector-lenses or any either high or lower power-thst is, s wide other desired arrangement of lenses, is infield of extended vision ors narrow eld,with serted and secured in position by means of 75 a more clear denition cf the obcct viewed. the block l5, which extendsthro h both the Another and further object o the invencurved slot 13 of the sleeve andum str-ai t s 5 tion is to provide s novel construction of adslot 7 of the cap, es shown in 2, an is fasting-sleeves mounted u on the lens-tubes removably secured in position by means of and in the main tube cib the instrument, the screw 16 there shown. whereby the adjusting-heads of such sleeves The eyepiece end of the elector-tube is inare directly adjacent to each other and the teriorly threaded and adapted to receive the 3o control' head for the eyepiece tem collar 17', provided with the threads 18 to gradua to indicate the movement creol' engage the threaded portion. This collar is relative tcitsco ting erector m. provided with a straight slot 19, dis- 85 Other and er objects and vsntages posed within the collar ia the eyepiece-adof the invention will be hereinafter full set usting sleeve 20, which is formed with the 35 forth and the novel features thereof d sad 21, ha graduations 22 upon its by the sp claims. outer face, ssiiixdicsted in Fig. 3, andadapted In the 1 is s lo 'tudinsl for inovsment relative to a graduation 24, 9c

section through the invention app ed to a carried upon the eyepiece-tube 25. The transit-telescope. 2 is a similar eiiseeve 20 is provided with a curved 4 larged section of the ens-tubes and thro h ferential slot 26 similar to that described m the j means. .3issfronteethsslesveS. Thesleeveiislocurcdwithin vation o! sdiustingfor the eyethe collar 17 by means of the threaded 95 piece-tube. Figs. 4, 5, 6 and 7 are detail 31, mounted thereon. Witlui thsioevs perspectives separated o the erector-tube the eyepiece-tube 25 extends and is 45 and the means for adjusting the same, and in position by mean of the block 27,

Fga.8,9,10,andllaresinnlarviswsofthe te dinthroughtheslotszand Wand e beanditsad'ustingmeans. m abysecuredinpositionhyamv Ish numerals of :n.erence indicate like own in Fig. 2. Any Jared form parts t the several views of the eyspiece,asshownat 29, may 5o drawings. removably attached bythrsads tothe Tne numeral I deggnstes the telescopepiece-Miha. cssing,whichi nay ce an desircdchsraetsr Frcmthsfcregoii.; description it crsissandvhlchisplo edatoneendwith ssenthsttheeyepioce-tubsiscarried elector-tubil and adjustable therewith, and for the lpurpose of varying the relation lietween t e evepiece lens system and that of 4. The com iination with a tube carrying the erector the eyepiece is adjustable relative j an objective lens, of eyepiece and erector to the erector by means of the head 2l in or- R lenses mounted for independent and for joint der to va the magnifying power of the telemovements, an adjusting device for reguliittube relative thereto and havi'ncoperating greduations u n a ace of said end.

scope, an both these tubes are jointl'l l ing sad independent movement, and s sepaadustoble iii their adjusted relation to eac l rate and independent adjusting device con ot er by means ol' the heed i2, controlling l nected with the objective tube or regulating the mentor-tube, which is essential for secur- L said joint movement. ing the pro yr focus relative to the crossp 5` ln a telescope, a casing, a supporting lilies and objective lens. cap mounted therein and provided with e This invention is particularly importent in strei lit slot in the tube thereof, an adjustsurveyii instruments where, owing to the in v-s eeve disposed within said cap and prohstencee, it is impossible to clearly vi distinguish a target with an instrument of head, a lens-tube dis sed within said sleeve and provided with a lock extending through width to locate such ii target. B decrensl the slots of the sleeve and cap, collar seing the magnifying power a wir e field ol l cured in said lens-tube and provided with a vision provided in which the target mei be l strei ht slot therein, an adjustingsleeve proeasily located, and the power muy then be in l vide with n curved slot and dis sed within creased toany desiredextent toeecure a ner ,i seid coller, and an eyepiece-tu e provided rower field with a clearer definition of any l with a block extending through the slots in indicatin characters which it may be de l seidslccve and collar. sired to o serve. 6. In e telescope, a casing, n supporting While reference has been mede herein to cap mounted therein and provided with a the use of an erector slid eyepiece system, straight slot in the tube thereof, an adjuststill env desired arrangement of lenses muy ing-sleeve disposed within said cap und probe u within the jointly and relatively ad vided with a curved slot and an operatingjustable lens-tubes to which thi` leneholders l hind, ii lenstube dis sed within said sleeve und provided with a lock extending through are applied The instrument provides e simple efficient, and economica construvthe slots of the sleeve and cap, a collar setion ol' parte in which the adjusting-bends i cured to said lenstulie und provided with a ore disposed adjacent to cach other und to straight slot therein, an edjustingeleeve pro the eyepiece of the instruriient, so that the 'vided with a curved slot and disposed within power mav he easily graduated said collar, a. usted eyeplece-tube proan when adjusted to the proper extent readvide-d with n lock extending through the ily focused upon the object to he viewed and i slots in head,sleeve and collar, and a graduthe cross-lincs of the instrument. ated face upon the lust-mentioned sleeve oollaving now described my invention and i operatingwith thegroduution of theeyepiooeset forth its merits, what I claim, and desire tube.

to secure by Letters Patent, is' 7. In a telescope, a casing, a lens-tubo adcoperating l justably supported therein, a. oollar throoded lens-tubes, means for ad'usting one of these into said lens-tube and provided with olontubes rolotive tp' the other, and a movable gitudmnl slot, an odlustingaleeveylpvidod device carried bv the easing and connected with a curved slot a within oud l. ln o telescope, a casing,

with said tublsfor 'ointl ad'ustin them in collar, o graduated eye tubo disposed their viously'adjlus relalton. g within said sleeve, a removable block upon e 2. n s telesco 4, a lui-slit of lens-'tubes the eyepiece-tube and ette th liiii angther, ay rotating head l slots ofthe sleeve uid collar, a noted disposed one wit vided with means for adjusting one of roto odjueting-heod for sud lens-tubo |iirunid tubes relativelv to the other, o telescoperou ing'sud tube. easing, ond e rotating head mounted therein In testimony whereof I ox my signature and having mans for jointly edjusting both in presence of two witness. tubes within e easing. l I

3. In a telescope, a luralit of leiietubes L GEORGE N SAEGMULLER one of which is provi ed wit. o usted Witnesses: hoe, und o rotating adjusting-he mounted l AinlD T. Guin,

in one of nid tubes for adjusting the other l C. Il. Folnim.

ed with a curved slot and an operatingA 

